Water purification project Whiteboard pen ink from Roselle, and stem bark. The objective is to produce the ink pen, whiteboard from Roselle, and stem bark.The trial procedure is as follows: Learn how to extract colors from red and hibiscus flower anchan and studying solvent can bring color and bite can be removed easily. Then try the flower and stem bark Roselle 30, 40, 50 grams of alcohol 30, 20 etching with Q4, 10 grams, respectively, for a period of 2 weeks, and then apply the solution ink pen with white droplets come in synthetic fiber is cotton instead of bars. Use written on the White Board, using the criteria of measuring the intensity of color shades and cleaning, which found that the ratio of substances soluble ink flower and shell 100% alcohol, Roselle continued towards alcohol is 40:20 with the intensity and cleaned most easily. Second is the ratio of 50:30 and 10:30, respectively.
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